Welding structure between aluminum pipe and copper pipe

Abstract

The utility model discloses a welding structure between an aluminum pipe and a copper pipe, which relates to the technical field of pipe fitting welding and comprises an aluminum pipe body and a copper pipe body, a first gap is arranged at the end part between the aluminum pipe body and the copper pipe body, and an accommodating outer seat is fixed on the outer side of one end of the aluminum pipe body close to the copper pipe body. A sealing inner ring is fixed to the inner side of the end, close to the copper pipe body, of the aluminum pipe body, a positioning outer ring is fixed to the outer side of the end, close to the aluminum pipe body, of the copper pipe body, a second gap is formed between the containing outer base and the positioning outer ring, and a covering end base is arranged on the inner side of the positioning outer ring. According to the welding structure between the aluminum pipe and the copper pipe provided by the utility model, through the positioning connection between the aluminum pipe body and the copper pipe body when the end parts are connected, fusion welding can be conveniently implemented between the aluminum pipe body and the copper pipe body by matching with the first gap and the second gap, and a fusion welding material layer can be conveniently filled between the aluminum pipe body and the copper pipe body to effectively increase the lap joint area of the aluminum pipe body and the copper pipe body; and then the inner side and the outer side between the aluminum pipe body and the copper pipe body are subjected to comprehensive fusion welding after welding, and the welding area is increased.

Description

Technical Field

[0001] This utility model relates to the field of pipe welding technology, and in particular to a welding structure between an aluminum pipe and a copper pipe. Background Technology

[0002] In current industrial production, it is often necessary to weld different metal pipes together. For example, the welding between aluminum pipes and copper pipes is a dissimilar metal welding. During welding, the two are connected at the overlapping end face of the pipes. Due to the limitation of the overlapping area, the joint area between the two after welding is small, resulting in low welding strength.

[0003] Furthermore, the existing electric arc welding often results in weak welds, low weld quality, and easy leakage at the weld due to the thin pipe wall, numerous weld points, and small weld area. Therefore, this application proposes a welding structure between aluminum pipe and copper pipe. Utility Model Content

[0004] Based on this, it is necessary to provide a welding structure between an aluminum tube and a copper tube to address the aforementioned technical problems. The sliding connection between the positioning guide rod and the positioning support block facilitates the positioning connection during the end connection between the aluminum tube and the copper tube, limiting the movement between them. This allows for the fitting of a first and second gap between the aluminum and copper tubes, and the use of a flow-guiding chamfer structure to guide the fusion welding of the solder layer. The solder layer effectively fills the space between the aluminum and copper tubes, increasing their overlap area. After welding, comprehensive fusion welding is achieved on both the inner and outer sides of the aluminum and copper tubes, increasing the welding area and making the weld more robust. Furthermore, the cooling of the solder layer effectively improves the sealing performance of the weld between the aluminum and copper tubes.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A welding structure between an aluminum tube and a copper tube, which is used for connecting and welding aluminum tubes and copper tubes;

[0007] The device includes an aluminum tube and a copper tube. A first gap is provided between the ends of the aluminum tube and the copper tube. An outer receiving seat is fixed to the outer side of the aluminum tube near the copper tube. A sealing inner ring is fixed to the inner side of the aluminum tube near the copper tube. A positioning outer ring is fixed to the outer side of the copper tube near the aluminum tube. A second gap is provided between the outer receiving seat and the positioning outer ring. A covering end seat is provided on the inner side of the positioning outer ring. The covering end seat is located at the end of the copper tube and fixed to the copper tube. The end of the covering end seat away from the copper tube is in contact with the inner side of the sealing inner ring. The outer side of the covering end seat is in contact with the inner side of the aluminum tube.

[0008] As a preferred embodiment of the welding structure between the aluminum tube and the copper tube provided by this utility model, a flow-guiding chamfer is provided at the end of the copper tube body near the aluminum tube body and on the outside of the cover end seat.

[0009] As a preferred embodiment of the welding structure between the aluminum tube and the copper tube provided by this utility model, the outer side of the cover end seat is provided with multiple grooves.

[0010] As a preferred embodiment of the welding structure between the aluminum tube and the copper tube provided by this utility model, the positioning outer ring has four positioning guide rods fixed in an array near one end of the aluminum tube body and located outside the copper tube body.

[0011] As a preferred embodiment of the welding structure between the aluminum tube and the copper tube provided by this utility model, four positioning blocks are fixed in the inner array of the outer seat, and the four positioning guide rods are respectively located inside the four positioning blocks and slidably connected to the positioning blocks.

[0012] In a preferred embodiment of the welding structure between the aluminum tube and the copper tube provided by this utility model, the outer diameter of the covering end seat is equal to the outer diameter of the sealing inner ring, and the inner diameter of the covering end seat is greater than the inner diameter of the sealing inner ring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The welding structure between the aluminum tube and the copper tube provided by this utility model facilitates the positioning connection when the aluminum tube body and the copper tube body are connected at the ends through the sliding connection of the positioning guide rod and the positioning support block. It limits the position between the aluminum tube body and the copper tube body, thereby facilitating the matching of the first gap and the second gap between the aluminum tube body and the copper tube body and guiding the fusion welding of the fusion welding material layer by using the flow guiding chamfer structure. It is easy for the fusion welding material layer to fill between the aluminum tube body and the copper tube body, effectively increasing their overlap area. After welding, the inner and outer sides of the aluminum tube body and the copper tube body are fully fused, increasing the welding area and making the welding more solid. After the fusion welding material layer cools down, it effectively improves the sealing performance of the weld between the aluminum tube body and the copper tube body. Attached Figure Description

[0015] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the overall structure of the welding structure between the aluminum tube and the copper tube provided by this utility model;

[0017] Figure 2 A schematic diagram of the welding structure between the aluminum tube and the copper tube provided by this utility model;

[0018] Figure 3 A schematic diagram of the welding structure between the aluminum tube and the copper tube provided by this utility model, showing the copper tube body near the aluminum tube body at one end.

[0019] Figure 4 A schematic diagram of the welding structure between the aluminum tube and the copper tube provided by this utility model, showing the aluminum tube body near the copper tube body at one end.

[0020] Figure 5 A cross-sectional view of the welded structure between the aluminum tube and the copper tube provided by this utility model.

[0021] The markings in the diagram are explained as follows:

[0022] 1. Aluminum tube body; 2. Copper tube body; 3. Positioning outer ring; 4. Positioning guide rod; 5. Flow guide chamfer; 6. Cover end seat; 7. Groove; 8. Receiving outer seat; 9. Positioning support block; 10. Sealing inner ring. Detailed Implementation

[0023] As described in the background art, due to the limitation of the overlap area, the joint area between the two after welding is small, resulting in low welding strength. The existing arc welding often results in weak welding, low welding quality, and easy leakage at the weld due to the thin pipe wall, many weld points, and small welding area.

[0024] To solve this technical problem, this utility model provides a welding structure between an aluminum tube and a copper tube, which is applied to the connection and welding between aluminum tubes and copper tubes.

[0025] The device includes an aluminum tube 1 and a copper tube 2. A first gap is provided between the ends of the aluminum tube 1 and the copper tube 2. An outer receiving seat 8 is fixed on the outer side of the aluminum tube 1 near the copper tube 2. A sealing inner ring 10 is fixed on the inner side of the aluminum tube 1 near the copper tube 2. A positioning outer ring 3 is fixed on the outer side of the copper tube 2 near the aluminum tube 1. A second gap is provided between the outer receiving seat 8 and the positioning outer ring 3. A covering end seat 6 is provided on the inner side of the positioning outer ring 3. The covering end seat 6 is located at the end of the copper tube 2 and fixed to the copper tube 2. The end of the covering end seat 6 away from the copper tube 2 is in contact with the inner side of the sealing inner ring 10. The outer side of the covering end seat 6 is in contact with the inner side of the aluminum tube 1.

[0026] The welding structure between the aluminum tube and the copper tube provided by this utility model, through the positioning connection at the end connection between the aluminum tube body 1 and the copper tube body 2, facilitates fusion welding between the aluminum tube body 1 and the copper tube body 2 by matching the first gap and the second gap. It is convenient for the fusion welding material layer to fill between the aluminum tube body 1 and the copper tube body 2, effectively increasing their overlap area. In turn, after welding, the inner and outer sides of the aluminum tube body 1 and the copper tube body 2 are fully fused, increasing the welding area and making the welding more solid. After the fusion welding material layer cools, it effectively improves the sealing performance of the weld between the aluminum tube body 1 and the copper tube body 2.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] Example 1:

[0030] Please refer to Figure 1-5 A welding structure between an aluminum tube and a copper tube includes an aluminum tube body 1 and a copper tube body 2. A first gap is provided at the ends of the aluminum tube body 1 and the copper tube body 2. When the aluminum tube body 1 and the copper tube body 2 are overlapped, in order to facilitate the reservation of the first gap, an outer receiving seat 8 is fixed on the outer side of the aluminum tube body 1 near the copper tube body 2. Four positioning blocks 9 are fixed in an array on the inner side of the outer receiving seat 8. A positioning outer ring 3 is fixed on the outer side of the copper tube body 2 near the aluminum tube body 1. Four positioning guide rods 4 are fixed in an array on the outer side of the positioning outer ring 3 near the aluminum tube body 1 and located on the outer side of the copper tube body 2. The four positioning guide rods 4 are respectively located inside the four positioning blocks 9 and are slidably connected to the positioning blocks 9. After the positioning overlap between the aluminum tube body 1 and the copper tube body 2 is completed by the sliding connection between the positioning guide rods 4 and the positioning blocks 9, a second gap is provided between the outer receiving seat 8 and the positioning outer ring 3.

[0031] To facilitate increasing the welding area on the inner side between the aluminum tube 1 and the copper tube 2, a sealing inner ring 10 is fixed on the inner side of the aluminum tube 1 near the copper tube 2. To facilitate fitting and connection with the sealing inner ring 10 and to receive the molten solder layer, a cover end seat 6 is provided on the inner side of the positioning outer ring 3. The cover end seat 6 is located at the end of the copper tube 2 and fixed to the copper tube 2. The end of the cover end seat 6 away from the copper tube 2 is fitted with the inner side of the sealing inner ring 10, and the outer side of the cover end seat 6 is fitted with the inner side of the aluminum tube 1. The outer diameter of the cover end seat 6 is equal to the outer diameter of the sealing inner ring 10, and the inner diameter of the cover end seat 6 is greater than the inner diameter of the sealing inner ring 10. To facilitate the filling and penetration space of the molten solder layer between the outer side of the cover end seat 6 and the aluminum tube 1, thereby further improving the welding firmness, multiple slots 7 are arrayed on the outer side of the cover end seat 6.

[0032] Example 2:

[0033] The welding structure between the aluminum tube and the copper tube provided in Example 1 is further optimized, specifically, as follows: Figure 5 As shown, when the solder layer fills the first gap through the second gap and enters the groove 7 through the first gap, thereby performing capillary penetration on multiple grooves 7, in order to facilitate the flow of the solder layer, a flow-guiding chamfer 5 is provided at one end of the copper tube 2 close to the aluminum tube 1 and located on the outside of the cover end seat 6.

[0034] The molten solder layer that penetrates the inner side of multiple grooves 7 through capillary penetration makes the bonding between the outer side of the cover end seat 6 and the aluminum tube 1 more uniform and tight, thereby giving the copper tube 2 and the aluminum tube 1 a better connection and welding strength. Especially when welding dissimilar metals, the different melting points, thermal conductivity and other physical properties of different metals result in shallower penetration. The molten solder layer that penetrates the inner side of multiple grooves 7 through capillary penetration can greatly improve the welding quality between the aluminum tube 1 and the copper tube 2.

[0035] Furthermore, the molten solder layer that overflows after capillary penetration in multiple grooves 7 facilitates the full filling of the first gap, the inner side of the outer seat 8, and the second gap, thereby achieving full fusion welding of the inner and outer sides of the aluminum tube 1 and the copper tube 2, increasing the welding area, improving the connection strength, and effectively improving the sealing performance of the weld between the aluminum tube 1 and the copper tube 2 after the molten solder layer cools.

Claims

1. A welded structure between an aluminum tube and a copper tube, comprising an aluminum tube body (1) and a copper tube body (2), characterized in that, A first gap is provided at the end between the aluminum tube (1) and the copper tube (2). An outer receiving seat (8) is fixed on the outer side of the aluminum tube (1) near the copper tube (2). An inner sealing ring (10) is fixed on the inner side of the aluminum tube (1) near the copper tube (2). A positioning outer ring (3) is fixed on the outer side of the copper tube (2) near the aluminum tube (1). A second gap is provided between the outer receiving seat (8) and the positioning outer ring (3). A covering end seat (6) is provided on the inner side of the positioning outer ring (3). The covering end seat (6) is located at the end of the copper tube (2) and fixed to the copper tube (2). The end of the covering end seat (6) away from the copper tube (2) is in contact with the inner side of the inner sealing ring (10). The outer side of the covering end seat (6) is in contact with the inner side of the aluminum tube (1).

2. The welding structure between the aluminum tube and the copper tube according to claim 1, characterized in that, The copper tube (2) has a flow guide chamfer (5) at one end near the aluminum tube (1) and on the outside of the cover end seat (6).

3. The welding structure between the aluminum tube and the copper tube according to claim 1, characterized in that, The outer array of the cover end seat (6) is provided with multiple slots (7).

4. The welding structure between the aluminum tube and the copper tube according to claim 1, characterized in that, The positioning outer ring (3) is fixed with four positioning guide rods (4) at one end of the aluminum tube (1) and on the outside of the copper tube (2).

5. The welding structure between the aluminum tube and the copper tube according to claim 4, characterized in that, The inner side of the outer seat (8) is fixed with four positioning blocks (9), and the four positioning guide rods (4) are located inside the four positioning blocks (9) and are slidably connected to the positioning blocks (9).

6. The welding structure between the aluminum tube and the copper tube according to claim 1, characterized in that, The outer diameter of the cover end seat (6) is equal to the outer diameter of the sealing inner ring (10), and the inner diameter of the cover end seat (6) is greater than the inner diameter of the sealing inner ring (10).

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